TMAG5173-Q1: Magnetic Characteristics - typ and max sensistivity error, offset

Andre Kronsbein

Part Number: TMAG5173-Q1

Hi,

I am working on a tolerance estimation and I am using the TMAG5173A2 Hall-Effect Sensors.
For this purpose, I would like to estimate the sensitivity error and the offset as a distribution function.

Therefore my question: How are the typical and maximum error defined for the sensitivity error and offset?
For example, I am confused by the large difference in the offset (typ 100μT vs max 700μT).
Is the typical error in these cases the standard deviation? And is it reasonable to assume a normal distribution or a uniform distribution or is there another useful distribution?

Thanks,

Andre

8 months ago

0 Alicia Rosenberger 8 months ago

TI__Expert 7975 points

Hi Andre,

Thank you for posting to the Sensors forum!

The reason for the large difference between the maximum and typical values highlighted above is due to considerations made for corner cases, which tend to not be seen by most devices/systems. The typical error is the average error/offset that may be seen given the specified test condition(s).

Best,

~Alicia

0 Andre Kronsbein 8 months ago in reply to Alicia Rosenberger

Prodigy 10 points

Hi Alicia,

Thank you for your answer.
For device safety considerations, I would like to better understand the distribution of the sensor's errors.

Do you have a model or function that describes the distribution of sensitivity errors and offsets in the defined range from the datasheet?

I understand that the typical error is an average error, but is it the mean value of the absolute errors or the root mean squared (rms) error?

And what is the probability of observing the maximum error?

Thanks,

Andre

0 Alicia Rosenberger 8 months ago in reply to Andre Kronsbein

TI__Expert 7975 points

Hi Andre,

I will need to discuss these questions with my team internally, and will to provide a response shortly.

Best,

~Alicia

+1 Alicia Rosenberger 7 months ago in reply to Alicia Rosenberger

TI__Expert 7975 points

Hi Andre,

I am sending you a friend request via E2E to further discuss your questions offline.

Best,

~Alicia